MLA-C01 Practice Question: ML Solution Monitoring, Maintenance and Security
This MLA-C01 practice question tests your understanding of ml solution monitoring, maintenance and security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is using a SageMaker notebook instance to develop models. The security team requires that all data in the notebook be encrypted at rest and in transit, and that internet access be restricted. Which configuration meets these requirements?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a VPC-only notebook instance with a customer-managed KMS key and disable direct internet access.
Option A is correct because a VPC-only notebook with KMS encryption ensures data at rest is encrypted and no internet access. HTTPS is used for in-transit. Option B allows internet access via NAT. Option C does not encrypt at rest. Option D ignores VPC restrictions.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use a notebook with internet access enabled but attach a security group that blocks all outbound traffic.
Why it's wrong here
Internet access enabled allows metadata service; blocking outbound may break SageMaker API calls.
✗
Use a notebook with a public subnet and a network ACL that denies all inbound traffic.
Why it's wrong here
Public subnet implies internet gateway, violating no internet access.
✗
Use a VPC-only notebook with default AWS managed key for EBS encryption.
Why it's wrong here
Default AWS managed key does not satisfy customer-managed encryption requirements.
✓
Use a VPC-only notebook instance with a customer-managed KMS key and disable direct internet access.
Why this is correct
VPC-only blocks internet, KMS encrypts at rest, HTTPS encrypts in transit.
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related MLA-C01 subnetting questions on CIDR, address ranges, and subnet selection.
ML Solution Monitoring, Maintenance and Security — This question tests ML Solution Monitoring, Maintenance and Security — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Use a VPC-only notebook instance with a customer-managed KMS key and disable direct internet access. — Option A is correct because a VPC-only notebook with KMS encryption ensures data at rest is encrypted and no internet access. HTTPS is used for in-transit. Option B allows internet access via NAT. Option C does not encrypt at rest. Option D ignores VPC restrictions.
What should I do if I get this MLA-C01 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related MLA-C01 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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